alpha
The transparency value applied to the node’s contents.
Declaration
var alpha: CGFloat { get set }Mentioned in
Discussion
The default value is 1.0.
The SKNode class does not perform drawing, but many of its subclasses do. When a node or any of its descendants are drawn, the alpha component of each pixel is multiplied by the node’s alpha property and then clamped to the range 0.0-1.0. This modified alpha value is used to blend the pixel into the framebuffer. Subclasses that render content define properties that determine the blending operations used in conjunction with the alpha value to blend pixels into the parent’s framebuffer.